Improvement in stove-pipe dampers



s. HAGEB. Stove-Pipe Dampers.

No.154 ,039. I P ater 1tedAug.H,18 74.

.NESQSESZQ A ttorneys.

UNITED STATES PATENT OEEIoE.

JACOB HAGER, OF MOLINE, ILLINOIS.

IMPROVEMENT IN STOVE-PIPE DAMPERS.

Specification forming part of Letters Patent No. 154,039, dated August11, 1874; application filed April 25, 1874.

damper to be applied at the joint of two sections of stove-pipe, formingalso a coupling for said sections, as will be hereinafter more fully setforth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in whichFigure 1 is a side elevation, part in section,

of two sections of stove-pipe with my damper placed between them. Figs.2 and 3 are detailed views of the damper.

A and B represent two sections of stovepipe united together by means ofmy dampercase. The damper-case is made in two sections, in the form oftwo collars, G and D, of slightly unequal diameter, provided on theirinterior with ears on a, united by bolts 1) b and nuts d d. The lowerlarger collar 0 has an interior circumferential shoulder, f, at theupper end. The upper end of the lower stovepipe section A is inserted inthe collar 0, or rather the collar is placed on the stope-pipe sectionstill it rests on the shoulder f. The upper smaller collar D has anexterior circumferential shoulder, h, at the lower end, and this collarfits in the lower end of the stovepipe section B till this section restson the shoulder h. At the joint of the two collars C D they areconstructed so as to form a slot for one-half the circumference for thepassage of the damper G, which is constructed to fit around the insideof the coupling 0 D at the joint, and it is provided with two ears, m m.The ear 112. forms the handle of the damper. and the ear m has a pin, n,on its under side, which enters a hole in an ear, n, on the collar 0,and forms the pivot upon which the damper turns.

It will be noticed that the exterior flange on the upper collar isflaring, and hence the pipe-section B must bind. In the damper G is ahole, ac,- or a part of the damper may be cut out, so as to allow theegress of gas even when the damper is closed. The damper can beregulated as desired, and it cannot be moved by the current or passageof air, however strong the draft.

I am aware that a, stove-pipe damper composed of two circular castings,the lower one of which has an extended horizontal shelf, upon whichmoves a sliding damper, is not new.

Having thus fully described my invention,

March, 1874.

JACOB HA'GER. Witnesses:

CHARLES SUNDBERG, E.-L. LoBDELL.

